[gcc r17-2426] [PATCH] RISC-V: Fix NULL location pointer check in target attribute parser

https://gcc.gnu.org/g:267d62e93e1be7ee62ab674090547a1585ceecf6

commit r17-2426-g267d62e93e1be7ee62ab674090547a1585ceecf6
Author: Jim Lin <[email protected]>
Date:   Wed Jul 15 13:58:47 2026 -0600

    [PATCH] RISC-V: Fix NULL location pointer check in target attribute parser
    
    parse_arch tested "if (*m_loc)", dereferencing the location_t pointer,
    while every other diagnostic site guards with "if (m_loc)".  Since
    m_loc can be NULL, test the pointer instead of dereferencing it.
    
    gcc/ChangeLog:
    
            * config/riscv/riscv-target-attr.cc
            (riscv_target_attr_parser::parse_arch): Check m_loc instead of *m_loc
            before emitting the diagnostic.
    
    Signed-off-by: Jim Lin <[email protected]>

Diff:
---
 gcc/config/riscv/riscv-target-attr.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/riscv/riscv-target-attr.cc b/gcc/config/riscv/riscv-target-attr.cc
index 5f265d0b242d..652e8d4a550d 100644
--- a/gcc/config/riscv/riscv-target-attr.cc
+++ b/gcc/config/riscv/riscv-target-attr.cc
@@ -148,7 +148,7 @@ riscv_target_attr_parser::parse_arch (const char *str)
 	{
 	  if (token[0] != '+')
 	    {
-	      if (*m_loc)
+	      if (m_loc)
 		error_at (*m_loc, "unexpected arch for %<target()%> "
 			  "attribute: must start with + or rv");
 	      goto fail;